Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A A0009063822

Visual condition of the part 

The product shows signs of use visible in the photos. 

Alternator Generator Mercedes W176 W246 Diesel Engine Bosch 175A is an original component from the Alternators and generators group, designed for diesel systems in Mercedes compact class vehicles. This used sub-assembly ensures factory-fit, stable charging of the electrical system, and proper power supply for all electrical consumers in a diesel-powered car.

Specifications and technical data

• SKU: A0009063822-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009063822
• Substitutable numbers: A0009063822, A 000 906 38 22, 0125711043, 0 125 711 043
• Fuel type: Diesel
• Category: Alternators & Generators

Purpose and function in the electrical system

The presented alternator is a Bosch design with a 175A current output, engineered to work with diesel engines in Mercedes W176 and W246 models. Its function is to convert mechanical energy from the crankshaft into electrical energy, which enables stable battery charging and powers all onboard systems – from engine control units and safety systems to interior comfort features.

The high current output allows for the safe operation of a vehicle equipped with extensive electronics, auxiliary heating, advanced driver assistance systems, and other consumers typical for modern Mercedes diesel vehicles.

Benefits of using an original Bosch alternator

Choosing an original Bosch alternator for the Mercedes W176/W246 series ensures:

• factory fitment for engine mounts and accessories,
• proper charging characteristics tailored to the vehicle's electronics,
• consistency with the factory operating parameters of the charging system,
• maintenance of correct interaction with the voltage regulator and engine control units.

As a result, installation is straightforward, without the need for modifications to the system or interference with the electrical wiring, and the charging system maintains the parameters specified by the vehicle manufacturer.

Condition, verification, and application in Diesel vehicles

The offered alternator is a used component, which allows for an economical repair of the charging system while maintaining original build quality. The sub-assembly comes from a Diesel-powered vehicle, meaning its operating characteristics are adapted to the loads and conditions typical for diesel units – including frequent starts, low-RPM operation, and higher current demands in urban conditions.

Before installation, a standard workshop procedure is recommended: checking the condition of the accessory belt, idler pulleys, ground connections, and charging voltage after starting the engine. A correctly selected and functional alternator significantly reduces the risk of starting problems, voltage drops, and errors in electronic systems.

Selection and compatibility within the Alternators and generators group

The alternator belongs to the Alternators and generators group, which facilitates its identification and selection based on technical parameters and suitability for a specific body series. When choosing, it is worth paying attention to:

• compatibility with the fuel type (in this case, Diesel),
• type and layout of mounts to the engine block,
• type of electrical connector and method of communication with the vehicle's system,
• current output matched to the vehicle's equipment.

This approach minimizes the risk of incorrect selection and allows for stable operation of the entire electrical system in a Mercedes compact class vehicle.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as alternators with different outputs, generators for other engine versions, or compatible charging units, check the available parts in the Mercedes Alternators and generators category.

For drivers who are simultaneously dealing with the condition of the drivetrain and want to better understand the relationship between electrical power supply and the durability of drivetrain components, the following guide may be helpful: Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.